don't quote me, but i understood once you delete the original linkshell if you are the leader you can use the same one again.

instead of testing it on your main shell though i would advise trying to make another shell and delete it and see if you can make that new shell again. just make a baby shell testshell12212 or something then delete it and try to make the shell again. at least then you would know the answer for sure instead of taking someone's answer as fact then finding out it is not.